Margarornis rubiginosus
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The ruddy treerunner (Margarornis rubiginosus) is a passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Costa Rica and Panama. The ruddy treerunner is 15 to 16 cm (5.9 to 6.3 in) long and weighs 17 to 24 g (0.60 to 0.85 oz). The sexes have the same plumage. Adults of the nominate subspecies have a buffy whitish supercilium and eyering on an otherwise dull rufescent brown face. Their crown is dull reddish brown and they have a narrow, paler reddish, collar. Their upperparts and wing coverts are reddish chestnut. Their flight feathers are dark fuscous with rufescent edges. Their tail is a slightly paler reddish chestnut than the back; the ends of the tail feathers lack barbs, giving a spiny appearance. Their throat is whitish with a buffy white lower edge. Their breast is dull rufescent brown with pale buff "Vees" on its upper part and darker buff spots on the lower. Their belly is almost unmarked dull rufescent brown and their flanks and undertail coverts are a darker chestnut... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Los Quetzales National Park | 🇨🇷 Costa Rica | |
| 2 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 3 | Volcán Barú National Park | 🇵🇦 Panama | |
| 4 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 5 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 6 | Irazú Volcano National Park | 🇨🇷 Costa Rica | |
| 7 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 8 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 9 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 10 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
Rare
Under 5% of wildlife watchers report a Ruddy Treerunner sighting in Arenal Volcano National Park on a given day, based on 64 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 398th most-seen of the 503 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Ruddy Treerunner in Arenal Volcano National Park on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Ruddy Treerunner sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
10th of 10
Of the 10 parks where we can rate Ruddy Treerunner sightings, Arenal Volcano National Park ranks 10th at under 5%. The best odds are in Los Quetzales National Park (Costa Rica, about 40%), Tapantí-Macizo de la Muerte National Park (Costa Rica, about 20%) and Volcán Barú National Park (Panama, about 20%).
Same family: Furnariidae
The closest relatives of the Ruddy Treerunner that you can see in Arenal Volcano National Park (family Furnariidae, Ovenbirds and Woodcreepers) are Wedge-billed Woodcreeper (about 30%), Streak-headed Woodcreeper (about 20%) and Spotted Woodcreeper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ruddy Treerunner is recorded against all the birds logged in Arenal Volcano National Park (64 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
